Synergy Digital GPS Battery, Compatible with Magellan Maestro 4040 GPS, (Li-ion, 3.7V, 1100mAh) Ultra High Capacity, Replacement for Magellan 37-00030-001 Battery
Specifications:
Battery Chemistry: Li-ion
Voltage: 3.7V
Capacity: 1100mAh
Compatible with: Magellan 37-00030-001 Battery
Works for: Magellan Maestro 4040 GPS and many more